BF, Dept. of Wood Technology, Lj. (BFLES)
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Globina penetracije vezivnega sredstva v les v odvisnosti od viskoznosti in deleža suhe snovi : diplomsko delo (univerzitetni študij) = Influence of viscosity and solid content on penetration depth of binder into wood : graduation thesis (university studies)Furlan, AlešPovršinska zaščita lesa s premaznimi sredstvi z nizko vsebnostjo hlapnih komponent ali na vodni osnovi, je vedno pomembnejša. Za kakovostno zaščito lesa s temi premazi je pomembno čim boljše ... razumevanje in poznavanje interakcij med premazi in lesom. Zato smo v nalogi poskušali narediti primerjavo med tremi vodnimi sredstvi in enim na osnovi organskih topil. Poskušali smo ovrednotiti vpliv deleža suhe snovi in viskoznosti na globino penetracije sredstva v les. Viskoznost in delež veziva smo uravnavali z dodajanjem ali evaporacijo topila in dodajanjem zgoščevalcev. Sredstvom smo po pripravi na vnaprej določene parametre določili viskoznost pri različnih strižnih razmerjih, površinsko napetost in kot omakanja na lesu. Z vpeljavo penetracijske konstante, ki smo jo izpeljali iz Washburnove enačbe, smo poskušali opisati sposobnost toka tekočega sredstva v les. Za primerjavo izračunanih globin penetracije smo nato preizkušance iz lesa smreke potapljali v tekoča premazna sredstva. Iz navzema smo z za to prirejeno enačbo izračunali globino penetracije. Globino penetracije pa smo ugotavljali tudi s fluorescenčno mikroskopsko tehniko. Ugotovili smo, da vpeljana penetracijska konstanta pri nizkih deležih suhe snovi slabo opisuje sposobnost penetracije sredstva na les. Na penetracijo ima večji vpliv delež suhe snovi kot viskoznost. Poleg vpliva, ki ga ima delež veziva, je opaziti tudi vpliv velikosti delcev v premazu. Pri poskusu z dodajanjem surfaktantov smo prišli do spoznanja, da v primeru popolnega omočenja lesa nadaljnje zmanjševanje površinske napetosti premaznega sredstva ni več smotrno.Type of material - undergraduate thesis ; adult, seriousPublication and manufacture - Ljubljana : [A. Furlan], 2002Language - slovenianCOBISS.SI-ID - 914569
Author
Furlan, Aleš
Other authors
Petrič, Marko |
Resnik, Jože
Topics
površinski premazi |
veziva |
viskoznost |
delež suhe snovi |
globina penetracije |
surface coatings |
binders |
viscosity |
solid content |
penetration depth
Call number – location, accession no. ... |
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Knjižnica BF za lesarstvo dn 0000000749 IN: 020020197 Knjižnica BF za lesarstvo dn 749 IN: 020020197 |
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Database name | Field | Year |
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Links to authors' personal bibliographies | Links to information on researchers in the SICRIS system |
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Petrič, Marko | 00395 |
Resnik, Jože | 06324 |
Source: Personal bibliographies
and: SICRIS
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